package com.yc.backstage.security.handler;

import cn.hutool.json.JSONUtil;
import com.yc.common.res.ResultClass;
import com.yc.common.enums.ResultCode;
import org.springframework.security.core.AuthenticationException;
import org.springframework.security.web.authentication.AuthenticationFailureHandler;
import org.springframework.stereotype.Component;

import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.nio.charset.StandardCharsets;

/**
 * @Classname LoginFailureHandler
 * @Description 认证失败的回调函数 AuthenticationFailureHandler：认证失败控制器
 * @Version 1.0.0
 * @Date 2022/7/26 14:50
 * @Created by Mikechen
 */
@Component
public class LoginFailureHandler implements AuthenticationFailureHandler {
    @Override
    public void onAuthenticationFailure(HttpServletRequest request, HttpServletResponse response, AuthenticationException exception) throws IOException, ServletException {
        response.setContentType("application/json;charset=UTF-8");
        ServletOutputStream outputStream = response.getOutputStream();

        String errorMessage = "用户名或密码错误";
        ResultClass result;
        if (exception instanceof AuthenticationException) {
            errorMessage = exception.getMessage();
            result = ResultClass.fail(ResultCode.LOGIN_ERROR.getCode(),errorMessage);
        } else {
            result = ResultClass.fail(ResultCode.LOGIN_ERROR.getCode(), errorMessage);
        }
        outputStream.write(JSONUtil.toJsonStr(result).getBytes(StandardCharsets.UTF_8));
        outputStream.flush();
        outputStream.close();
    }
}
